Instrument-dial.



T. 2. DUFFY.

INSTRUMENT DIAL.

APPLLQATIQN man MAY I4. mi.

1,820,383 1mm@ Sw, man

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sre'rns rnirnirr orsi Trier/ois' norm; osonrorieo, ILLINOIS, Assiettes.fro s'rnwennwssnns. seltener-terne Conroy-...erwin er ottici-ien,routiers; .A oenronefrioit or To all 'ze/ mm it may concern:

Be it known that l, TiroMAs DUFFY, e. citizen et' the United Statesresiding et lliieagro; in tliecounty of @ook and the rital'e or"illinois, have invented certain new and nselni improvements ininstrumen-t- Dials, el Weich the' ,t'ollo'wing` is e specificetion,reference beinghad to tlie aeeompenyingr ilraivings, forming' a partthereof.

speedometer and odometer and consists in certain 'features of.construction and their combinations herein described and shown in thedrawings ns indicated by the claims.

lin the drawingst Figure 1 is a. vertical sectional view of :Lcombine/.l sgwmlemeter and mlometer provided with indicating; membersand n dial plate einlifn'-jin5r this invention.

Fig. 2 is a front' elevation of' the instrument shown in. Figli.. 1.Fig. 3 is a detail section taken as indicated at line 3--35 on Fig. 2f.

ln many terms oiE meters and registers` in which the indication is bymeans of a nioraliie scale or indieatii'ro` member of Wliirli a limiledportion is rendered visible through a window in the dial plate o iftlieinstrument, it is Vi'remiently desirable to mount the instrument so thatthe dial plate issnlistann tiaily in a.. vertical plane. ln aspeedometer or odometer et this general type, it is also desirable thatthe actuating shaft sha-ll e Vfrom the asino; substantinll v pai-al lelto the plane ot the dial plate setlrxt the ileililrdrivinglslnifttl'irongli wliiy., it is eonneeted to the Y ;roiwllersliatt or tothe road wheel et tlie veliiele may trend directly iliwv'nwa'fl fromille inslfinmei'it without the use et bevel. or spiral gears. Theseresults plete is siinstaifitialiy vertical., the driver is 'forced toView the nidieotniganeniher at s.v

Speciation o-Letters Patent..

XNSTRUMEN i2-lll KAL.

Application filed May 1li, 39W. Serial Litio, lhtw'.

disadvantage because his line oblique to its surtsce.

ln the present oonstrnetion as indicated in Fig l, the' substantiallyvertical dial plete9 l, is provided Wi .li Windows, 2 end 3i for theodometer, :ind with a, Windowrif, for the speedometer. The odometersesleinarks Whieh eonsist simply in aseries et numerals on each of 'thecounter wheels. 5, are carried on the cylindrical suri'aeesot theseWheels, and the windows, 2 fand 3, instead of having their horizontalcenter line approximately in the horizontal plane of tlieaxis oi thecounter wheelsa 5; are positioned considerably above this axis so as torender visible n certain limited area oi the Wheel surfaces which extendobliqnely with respect to the general plane of the dial plate, l, and drof sight is upwardly thererom. I Thus when the instrument is mountedwith the dial folate, l, substantially vertical and the odometer ignresen the Wheel5 5, nre viewed from a point considerably above theinstrument, the line of sight to the lignres will strike 'thevisible'surifaees ot' the dial wheels7 5, more nearly at right angles,giving' the nnixinnnnof legihility to the figures.

To secure a similar effect with the speedometer scale which is carriedon the skirt, r. of the drag; member, C, mounted to ro tete on a.4vertical a. 's and actuated in a. Welt mnlerstood manner by means o'l.Ea magnet, i. (1o-axial with, it, the skirt, (i, formed llaringrdoi'ifn'wardly so as to constitu.; transverse section et aeone, and sothat' thev portion of its surface which is visible at the wifiilow, 4i,"Will extend olliquely with spent to the dial plo-te, 11 direrging upaseries et speed-indieating miniera-lsf the skirt, il, is usuallyprovided with an equini part sale. and when formed as shown. in. Eig. 'lit will lie evident that the scale niark7 (5b, will converge slightlytoward the apex ot' theeoml), oit which the skirt, 6, is e por tion. Inconformity wth this eine, the

lateral margins of 'the Window., l, may' also be made to slant at ecorresponding' angle, as in Fig'. 2.,

With the risible snr'laeeoi' the Wheels, and drag oup.- 6, inclined asto the dial plate, l, as shown, it will loe evident tiret it theWindows, 2, 3 ande, were :merely ont a perfectly dat diei their uppermet itil@ iet

